Heat of Fusion and Heat of Vaporization

How many Joules of energy are required to make 50.0 grams of ice at 0 ^οC completely melt?

• 334 J

• 0 J

• 33,400 J

• 16,700 J

Specific heat of water is  4.18 J/g°C. Specific heat of wood is 1.760 J/g°C What material needs more heat energy to raise the temperature?

• Water
• Wood
• Both are same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t

• Q=mH

• Q= ½mv

• m=QC

The heat absorbed while a solid is melting is known as....

• heat of fusion

• heat of solid

• heat of liquid

• heat of vaporization

Calculate the energy needed to completely boil away 30 g of water at 100 ⁰C .

• 67,800 J

• 2260 J

• 226,000 J

• 100 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Heat always flows from a __________________ to a cooler object.

• warmer

• cooler

• liquid

• gas

Tags

NGSS.HS-PS3-4

Higher temperatures indicate

• slower motion of molecules

• molecules at rest

• faster motion of molecules

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Temperature when a substance changes from a solid to a liquid

• freezing point

• heat of fusion

• thermal expansion

• melting point

Tags

NGSS.MS-PS1-4

The Temperature when a liquid turns to a solid

• freezing point

• heat of fusion

• thermal expansion

• melting point

Tags

NGSS.MS-PS1-4

The amount of heat needed to change 1 gram of a substance from the liquid phase to the gas phase is ___

• Heat of Vaporization

• Boiling point

• Heat Energy

• Phase change